shellphone.app/app/pages/_app.tsx

import { Suspense } from "react";
import {
	AppProps,
	ErrorBoundary,
	ErrorComponent,
	AuthenticationError,
	AuthorizationError,
	ErrorFallbackProps,
	useQueryErrorResetBoundary,
} from "blitz";

import LoginForm from "../auth/components/login-form";

import "app/core/styles/index.css";

export default function App({ Component, pageProps }: AppProps) {
	const getLayout = Component.getLayout || ((page) => page);

	return (
		<ErrorBoundary
			FallbackComponent={RootErrorFallback}
			onReset={useQueryErrorResetBoundary().reset}
		>
			<Suspense fallback="Silence, ca pousse">
				{getLayout(<Component {...pageProps} />)}
			</Suspense>
		</ErrorBoundary>
	);
}

function RootErrorFallback({ error, resetErrorBoundary }: ErrorFallbackProps) {
	if (error instanceof AuthenticationError) {
		return <LoginForm onSuccess={resetErrorBoundary} />;
	} else if (error instanceof AuthorizationError) {
		return (
			<ErrorComponent
				statusCode={error.statusCode}
				title="Sorry, you are not authorized to access this"
			/>
		);
	} else {
		return (
			<ErrorComponent
				statusCode={error.statusCode || 400}
				title={error.message || error.name}
			/>
		);
	}
}